Hi, @jichen:
Something I found, FYI:
The commit history in here: https://review.openstack.org/#/c/138795
I noticed that the unquience change call to cast in PS5 and PS6:
https://review.openstack.org/#/c/138795/5..6/nova/compute/rpcapi.py
and some comments on
https://review.openstack.org/#/c/13879
During review https://review.openstack.org/#/c/529278/2 ,some question on
the method for quience/unquience
https://github.com/openstack/nova/blob/master/nova/compute/rpcapi.py#L1140
use call for quience
https://github.com/openstack/nova/blob/master/nova/compute/rpcapi.py#L1146
use cast for unquie
